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UniProtKB/Swiss-Prot O95342: Variant p.Arg432Thr

Bile salt export pump
Gene: ABCB11
Variant information

Variant position:  432
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  LP/P [Disclaimer]
The variants are classified into three categories: LP/P, LB/B and US.
  • LP/P: likely pathogenic or pathogenic.
  • LB/B: likely benign or benign.
  • US: uncertain significance

Residue change:  From Arginine (R) to Threonine (T) at position 432 (R432T, p.Arg432Thr).
Indicates the amino acid change of the variant. The one-letter and three-letter codes for amino acids used in UniProtKB/Swiss-Prot are those adopted by the commission on Biochemical Nomenclature of the IUPAC-IUB.

Physico-chemical properties:  Change from large size and basic (R) to medium size and polar (T)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -1
The score within a Blosum matrix for the corresponding wild-type to variant amino acid change. The log-odds score measures the logarithm for the ratio of the likelihood of two amino acids appearing by chance. The Blosum62 substitution matrix is used. This substitution matrix contains scores for all possible exchanges of one amino acid with another:
  • Lowest score: -4 (low probability of substitution).
  • Highest score: 11 (high probability of substitution).
More information can be found on the following page

Variant description:  In BRIC2; reduced transport capacity for taurocholate; reduces transport activity of taurocholate in a low cholesterol environment; increases transport activity of taurocholate in a high cholesterol environment.
Any additional useful information about the variant.

Other resources:  
Links to websites of interest for the variant.



Sequence information

Variant position:  432
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  1321
The length of the canonical sequence.

Location on the sequence:   KLDRIKGEIEFHNVTFHYPS  R PEVKILNDLNMVIKPGEMTA
The residue change on the sequence. Unless the variant is located at the beginning or at the end of the protein sequence, both residues upstream (20) and downstream (20) of the variant will be shown.

Residue conservation: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.

Human                         KLDRIKGEIEFHNVTFHYPSRPEVKILNDLNMVIKPGEMTA

Mouse                         KLDRIKGEIEFHNVTFHYPSRPEVKILNNLSMVIKPGETTA

Rat                           KLDRIKGEIEFHNVTFHYPSRPDVKILDNLSMVIKPGETTA

Rabbit                        KLERIKGEIEFHNVTFHYPSRPEVKILNNLSMVIKPGEMTA

Sequence annotation in neighborhood:  
The regions or sites of interest surrounding the variant. In general the features listed are posttranslational modifications, binding sites, enzyme active sites, local secondary structure or other characteristics reported in the cited references. The "Sequence annotation in neighborhood" lines have a fixed format:
  • Type: the type of sequence feature.
  • Positions: endpoints of the sequence feature.
  • Description: contains additional information about the feature.

TypePositionsDescription
Chain 1 – 1321 Bile salt export pump
Topological domain 375 – 755 Cytoplasmic
Domain 420 – 656 ABC transporter 1
Mutagenesis 1 – 441 Missing. Does not affect ATPase-coupled bile acid transport activity. Decreases protein stability.
Beta strand 430 – 432


Literature citations

Impaired expression and function of the bile salt export pump due to three novel ABCB11 mutations in intrahepatic cholestasis.
Noe J.; Kullak-Ublick G.A.; Jochum W.; Stieger B.; Kerb R.; Haberl M.; Muellhaupt B.; Meier P.J.; Pauli-Magnus C.;
J. Hepatol. 43:536-543(2005)
Cited for: VARIANTS BRIC2 GLY-297 AND THR-432; CHARACTERIZATION OF VARIANTS BRIC2 GLY-297 AND THR-432;

Differential effects of membrane cholesterol content on the transport activity of multidrug resistance-associated protein 2 (ABCC2) and of the bile salt export pump (ABCB11).
Guyot C.; Hofstetter L.; Stieger B.;
Mol. Pharmacol. 85:909-920(2014)
Cited for: CHARACTERIZATION OF VARIANTS BRIC2 GLY-297 AND THR-432; CHARACTERIZATION VARIANT ALA-444; FUNCTION; CATALYTIC ACTIVITY; ACTIVITY REGULATION;

Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.